The direct interaction you have with your calls - saying something to them, playing audio, asking questions, recording their replies - covers the majority of the functions you'll need to create creative and powerful applications. There are, however, a few additional functions you'll often need, especially for business applications - transferring, rejecting and conferencing. Each controls the call flow, determining where a call is supposed to go once it comes in, as opposed to interacting with the call once it's connected. Check out each of the following chapters for more information on each:
